Hi Boris,
you need no plugin for selecting a spot in the FFT and doing the inverse FFT of it.
Just paint the spot white (pixel value=255) and do Process>FFT>Inverse FFT in plain ImageJ.
E.g. with white background (double click the eyedropper and click to the bottom right of the 'CP' panel), you can make the spot white by creating a small selection (a few pixels) around the FFT spot and 'Clear' (DELETE key). You may also use the Pencil tool.
You need to paint only one of the two opposite spots, ImageJ will paint the symmetry-equivalent one for you.
Note that you should not change the white color in the Adjust Brightness&Contrast (B&C) panel, otherwise what you paint as white will not correspond to a pixel value of 255 and it won't work.
You can restore the original FFT display by putting the image into the foreground an Process>FFT>Redisplay Power Spectrum.
See the documentation
http://rsb.info.nih.gov/ij/docs/guide/146-29.html#toc-Subsection-29.10Michael
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On May 13, 2014, at 18:53, Reznik, Boris (AGW) wrote:
> Hello ALL,
>
>
>
> We all looking for a plugin allowing to carry out FFT analysis of HRTEM image.
>
> The plugin should allowed to select point within diffraction patterns and to produce reverse FFT.
>
>
>
> And any advice would be greatly appreciated.
>
>
> with regards,
> Boris
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